Add flags_without_count option to show git status icons without counts

[Copilot]

This PR adds a new configuration option flags_without_count that allows users to display git status symbols without their numerical counts, saving space while still providing visual status indicators.

Changes

• New option: Added flags_without_count boolean option to the configuration (defaults to false for backward compatibility)
• Enhanced formatting: Modified the flags() function to conditionally exclude counts when the option is enabled
• Updated default config: Added the new option to .gitmux.yml with proper documentation
• Comprehensive tests: Added TestFlagsWithoutCount() with multiple test cases covering various scenarios

Behavior

Before (default behavior):

⎇ main origin/main - ● 3 ✚ 2 … 1 ⚑ 1

After (with flags_without_count: true):

⎇ main origin/main - ● ✚ … ⚑

The feature works with all git status flags:

• ● (staged files)
• ✚ (modified files)
• … (untracked files)
• ⚑ (stashed changes)
• ✖ (conflicts)
• ✔ (clean - unaffected as it never shows counts)

Usage

Add to your .gitmux.yml configuration:

tmux:
  options:
    flags_without_count: true

This change is fully backward compatible - existing configurations will continue to work unchanged since the option defaults to false.

Fixes #124.

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[arl]

@copilot look at the comment I made below the issue description in #129
My comment gives you the name of the new option and some example.

Here are added requirements for this issue:

• there should be unit tests
• default configuration (.gitmux.yml) should be modified with the new option.
• README.md should be updated and document the new option.

[Copilot]

@copilot look at the comment I made below the issue description in #129
My comment gives you the name of the new option and some example.

...

All requirements have been addressed in commit 2445860:

✅ Unit tests: Added TestFlagsWithoutCount() with comprehensive test cases covering various scenarios
✅ Default configuration: Updated .gitmux.yml with the new flags_without_count option and documentation
✅ README.md: Added the new option to the "Additional options" table with description and default value

The flags_without_count feature is now fully implemented and documented. When enabled, it shows git status symbols without counts (e.g., ● ✚ … ⚑ instead of ● 3 ✚ 2 … 1 ⚑ 1).

[arl]

Nice job, see the unique comment and were good to go! 🚀

[arl]

Since this option name is wider than the others, please realign the markdown table as I want the readme to be nice even when read without rendered as markdown.

[Copilot]

Fixed the markdown table alignment in commit 6af350e. The table now has consistent spacing to accommodate the wider flags_without_count option name.